Home / 12,811.98-19,126.38-11,898.30

Finding the Fourth Proportional to 12,811.98, 19,126.38 and 11,898.30

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Solution

The fourth proportional to 12,811.98, 19,126.38 and 11,898.30 is: 17,762.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,811.98 : 19,126.38 = 11,898.30 : x
  2. Step 2: Convert to fraction form
    12,811.98/19,126.38 = 11,898.30/x
  3. Step 3: Cross multiply
    12,811.98x = 19,126.38 × 11,898.30
  4. Step 4: Simplify right side
    12,811.98x = 227,571,407.15
  5. Step 5: Solve for x
    x = 227,571,407.15/12,811.98
  6. Step 6: Final answer
    x = 17,762.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.